This Week in Nature

Members of The Cancer Genome Atlas team this week present a molecular characterization of 276 colorectal carcinoma samples; the researchers analyzed the samples' exome sequence, DNA copy number, and promoter methylation as well as mRNA and microRNA expression. "A subset of the colorectal tumors — most often those turning up in the right or ascending colon — had unusually high mutation levels.

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A new study in JAMA finds that genetic tests might not be able to determine what diet is right for someone seeking to lose weight.

A genome-wide association study that linked common genetic variants to salivary gland carcinoma risk has been retracted, according to Retraction Watch.

Vampire bats' ability to live off blood is etched in their genomes and gut microbiomes, the Scientist reports.

In Genome Biology this week: peopling of the Sahara, epigenetic reprogramming analysis of liverwort, and more.